What this means is that by changing only one hormone, “suddenly you change your entire relationship with food”, says Prof Giles Yeo, an obesity scientist at the University of Cambridge. And that has all sorts of implications for the way we think about obesity.

What health experts think of the growing Ozempic “microdosing” trend that claims taking very small doses of GLP-1 drugs can still help people lose weight with fewer side effects at a lower cost.